The first storm from the tail end of an atmospheric river brought light to moderate rain throughout the Los Angeles area. A second storm is already making its way toward the region. The National Weather Service said the first storm system underperformed across most of the area.

The incoming rain has sparked concerns about toxic debris in the burn scar areas. Tom Wait and Nicole Comstock report.

The wet weather will bring relief to Southern California after a prolonged period of dryness, but there’s concern that any bursts of heavy rainfall could cause flooding.